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目的:探讨基于3D打印技术制备的个性化重建钛板在髂骨移植修复下颌骨缺损中的应用效果。方法:对6例拟进行下颌骨节段切除的病人,应用3D打印技术打印出下颌骨的树脂模型,制备个性化重建钛板桥接骨缺损两端,并切取髂骨植入骨缺损区,钛钉内固定。术后通过临床检查及X线和CT检查,观察患者的面部外形和咬合关系恢复情况,以及伤口愈合和移植骨成活情况。结果:在6例病例中有5例手术顺利,植入的钛板与缺损两端的下颌骨外侧面贴合紧密;术后随访3~12个月,经临床和CT检查未见肿瘤复发。颌面部外形恢复良好,余留牙咬合关系恢复良好。1例术后3周出现伤口感染,植骨失败。结论:应用3D打印技术预成型的重建钛板联合髂骨移植适用于下颌骨外侧面出现瘤性隆起或破坏的下颌骨肿瘤切除术后的缺损修复。
OBJECTIVE: To investigate the effect of personalized titanium plate based on 3D printing technology in repairing mandibular defects with iliac bone graft. Methods: Six patients who underwent mandibular segmental resection were enrolled in this study. The mandibular resin model was printed by using 3D printing technology. Both ends of the titanium bridging defect were prepared and implanted iliac bone defect and titanium nail Internal fixation. Postoperative clinical examination and X-ray and CT examination to observe the patient’s facial shape and occlusal recovery, as well as wound healing and graft survival. Results: Of the 6 cases, 5 cases were operated smoothly. The implanted titanium plate was in close contact with the lateral surface of mandibular defect at both ends of the defect. The patients were followed up for 3 to 12 months. There was no tumor recurrence after CT and CT examination. Maxillofacial shape recovered well, leaving the occlusion of teeth recovered well. One case had wound infection 3 weeks after operation, and bone graft failed. CONCLUSION: The reconstructed titanium plate combined with iliac bone graft pre-formed by 3D printing technology is suitable for the repair of mandibular tumor after tumor resection.